Quartz-free powdered magmatic nepheline rock material for the su

Details Quartz-free powdered magmatic nepheline rock material for the su Quartz-free powdered magmatic nepheline rock material for the su

1992-09-08

1995-01-10

Lieberman, Paul

Compositions: coating or plastic

Coating or plastic compositions

Polishes

106 35, 424 52, A61K 600, A61K 730

Patent

active

053803566

ABSTRACT:
The invention is directed to the creation of a material which does not have the hazardous properties of prior art materials containing quartz. In the material according to the invention, quartz is replaced with a quartz-free magmatic rock, especially nepheline syenite. Surprisingly, the magmatic rock in powdered form attains nearly the same treatment results as conventional materials which contain quartz. The material according to the invention is particularly suitable for polishing and blasting dental parts, especially those parts which are made of plastic material.

REFERENCES:
patent: 2489848 (1949-11-01), Bacon et al.
patent: 2559122 (1951-07-01), Hessel et al.
patent: 3690366 (1972-09-01), Schwartz
patent: 3892843 (1975-07-01), Muhler et al.
patent: 4044507 (1977-08-01), Cox et al.
patent: 4658826 (1987-04-01), Weaver
patent: 5037453 (1991-08-01), Narayananet al.
Derwent Publications Ltd., London, GB; AN 85-180799 & JP-A-60 108 500 (Lion Corp.) Jun. 13, 1985.
Derwent Publications Ltd., London, GB AN 91-196387 & JP-A-3 120 204 (Mizusawa Chemical) May 22, 1991.
Berry and Mason, Mineralogy Concepts Descriptions Determinations (pp. 218-223, 363, 492) no month available 1959.

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